Officially canonized back in 2008 with AMD’s “small die” strategy, dual-GPU cards have since become a staple of AMD’s product lineup. Filling a small-but-important niche for AMD, dual-GPU cards allow AMD to both deliver ultra-enthusiast performance levels their traditional single-GPU products can’t offer, and at the same time compete with NVIDIA’s big die flagship cards without AMD needing to produce a big die GPU of their own. As a result, though these cards aren’t necessarily obligatory, with each generation we’re left eagerly awaiting just what AMD has in store for their capstone product.

Of course with that said, like so many other facets of the 7000 series, the dual-GPU situation has played out rather unusually in the past year. In a typical year we would see AMD release a standard design, and then later on partners like Asus and PowerColor would release their own custom designs in the name of product differentiation and squeezing out just a bit more performance. Instead the 7000 series has played out in reverse: Asus and PowerColor released their designs first. Consequently, up until this point the 7990 has been “officially unofficial”, reflecting the fact that the first 7990s were AMD sanctioned products, but not based on AMD designs.

But at long last the 7990 is becoming fully official. AMD is getting into the game with their own 7990 design, and perhaps more importantly they’re doing so while coming to bear with the kind of engineering resources that only a GPU manufacturer can provide. This isn’t going to be the first 7990 – that honor belongs to PowerColor’s 7990 – but this is unquestionably the most important 7990. For AMD and their partners going official doesn’t just mean the AMD is taking a greater role in matters, but as we’ll see it means changing the rules of the game entirely.

AMD GPU Specification Comparison

AMD Radeon HD 7990

AMD Radeon HD 7970 GHz Edition

AMD Radeon HD 7970

AMD Radeon HD 6990

Stream Processors

2 x 2048

2048

2048

2 x 1536

Texture Units

2 x 128

128

128

2 x 96

ROPs

2 x 32

32

32

2 x 32

Core Clock

950MHz

1000MHz

925MHz

830MHz

Boost Clock

1000MHz

1050MHz

N/A

N/A

Memory Clock

6GHz GDDR5

6GHz GDDR5

5.5GHz GDDR5

5GHz GDDR5

Memory Bus Width

2 x 384-bit

384-bit

384-bit

2 x 256-bit

VRAM

2 x 3GB

3GB

3GB

2 x 2GB

FP64

1/4

1/4

1/4

1/4

Transistor Count

2 x 4.31B

4.31B

4.31B

2 x 2.64B

PowerTune Limit/TDP

375W

250W+

250W

375W

Manufacturing Process

TSMC 28nm

TSMC 28nm

TSMC 28nm

TSMC 40nm

Architecture

GCN

GCN

GCN

VLIW4

Launch Date

04/23/2013

06/22/2012

01/09/2012

03/11/2011

Launch Price

$999

$499

$549

$699

Diving right into the thick of things, like the officially unofficial cards before it, AMD’s 7990 is a dual-Tahiti part, placing two of AMD’s flagship GPUs on a single PCB to make a single card. AMD has held nothing back and these are fully enabled GPUs, so each GPU has all 2048 stream processors, 32 ROPs, and their full 384-bit memory buses present. Joining these GPUs is 6GB of GDDR5 RAM, split up between the two GPUs for the 7900-series standard of 3GB of VRAM per GPU.

The big question with any dual-GPU card of course is what kinds of clockspeeds it can run at, and as a turns out the 7990 can clock rather high. The 7990 is a PowerTune Boost part like the 7970GE it’s based on, giving the card a base clockspeed of 950MHz, and a boost clock of 1000MHz. Meanwhile the memory is clocked at 6GHz, the same as the 7970GE. As a result the 7990 is surprisingly close to being a 7970GE Crossfire setup on a single card, clocked just 50MHz below AMD’s single-GPU flagship card. In fact this is better than some of the earlier 7990s such as PowerColor’s, which were clocked lower and simultaneously lacked PT Boost.

But perhaps the most defining aspect of AMD’s 7990, and the thing that sets it apart from unofficial 7990s that came before it is the TDP. AMD’s 7990 has an official TDP of just 375W, which although common for official dual-GPU cards, is quite a bit lower than the TDPs of the unofficial 7990s. As the GPU manufacturer AMD has the ability to do finely grained binning that their partners cannot, so while Asus and PowerColor have essentially been putting together cards that really are two 7970s on a single card – right down to the TDP – official 7990s get the advantage of AMD’s binning process, significantly reducing power consumption. The end result is that while an unofficial 7990 would be a 450W+ part, AMD can deliver the same or better performance while consuming much less power, putting the 7990 within the all-important 375W envelope that OEMs and boutique builders look for.

While we’re on the subject of power, this is the first official AMD dual-GPU part to include AMD’s ZeroCore power technology, which was introduced with the GCN family. ZeroCore as you might recall allows AMD to almost completely shut off slave GPUs when they’re not in use, which in turn allows AMD to further reduce their idle power consumption. The biggest benefits are found in multi-card setups since this allows the fans on those slave cards to be shut down, but even on the 7990 it still provides a benefit by allowing AMD to curtail their idle power consumption. Consequently this pushes the idle TDP of the 7990 down to around 20W, which is greater than a single card, but a clear improvement over 6990 and earlier AMD dual-GPU cards.

Moving on to product stacks and competition, it comes as no great surprise that AMD is placing their newest flagship part directly opposite NVIDIA’s flagship cards. AMD doesn’t produce a GPU equivalent to GTX Titan’s massive GK110 GPU, so the 7990 is AMD’s official answer to both Titan and NVIDIA’s own dual-GPU card, the nearly year-old GTX 690. In the case of the GTX 690 it’s a rather straightforward matchup since both cards are based on the same principles, while against Titan AMD needs to make a case about raw performance versus the inherent simplicity of a single-GPU solution over a dual-GPU solution.

Along those lines, since AMD is placing the 7990 against NVIDIA’s flagships they will also be pricing it directly against NVIDIA’s flagships, setting the MSRP for the 7990 at $999. This steep price tag raised some ire with the GTX 690 and with GTX Titan, and it likely will here once more. But with single 7970GEs still regularly going for $400-$500 and the fact that AMD is throwing in their best Tahiti chips into 7990, there’s little incentive to charge less. A 7970GE CF setup will be both faster and cheaper, but as a pair of those cards take up 6 slots after accounting for cooling needs, AMD can bank on the fact that the 7990 is essentially the same size as a 7970GE, charging a premium for the size advantage.

Ultimately customers interested in the 7990 will have a bit of time to sit on the matter and decide if they want one. The 7990 is being launched ahead of its actual retail availability, with AMD telling us the cards will hit etailers within two weeks. Meanwhile all of AMD’s usual partners will be participating on this 7990, so expect to see 7990 cards from all of major AMD partners, and sold at all of the major etailers.

Finally, AMD has been having a blast with game bundles over the last few months, and they won’t be stopping with the 7990. In a game bundle that quite frankly I cannot recall being rivaled by anything else done in the last 20 years, AMD will be bundling the 7990 with 8 different games from the current and past Never Settle bundles. All of AMD’s current bundle titles are included: Crysis 3, Bioshock Infinite, Tomb Raider, and Far Cry 3: Blood Dragon. Along with that AMD is also packing in the best games out of their previous bundles: Far Cry 3, Hitman: Absolution, Sleeping Dogs, and Deus Ex: Human Revolution. Simply put, 7990 buyers will be well-stocked for games to play on their new video card.

Meanwhile on housekeeping note, AMD will be changing how vouchers are distributed for the 7990; rather than having etailers distribute the vouchers with qualifying purchases, AMD’s partners will be packing the vouchers into the product box. Though the etailers have been good about including vouchers, they do at times forget them. So for the 7990 AMD and their partners aren’t going to be taking any chances.

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91 Comments

I said a week or two ago you'd find an excuse to leave out fcat...LOL. You did. Even come up with a problem nobody else has, and show a large boost to AMD that places like tomshardware don't show while showing NV cards slower than their benchmarks in the exact same games and resolutions.

Just like the percent gains in the driver post a few days ago (as I posted all of your %'s were lower than NV's own page which I linked to), you have NV scoring lower than other reviews.http://www.anandtech.com/show/6913/nvidia-r319-ser...Read the last comment people...They seem to lie a lot here and it's not surprising AMD chose to talk ONLY to this site recently and avoided access even to these guys to the driver team working on the "ISSUES" AMD has.

Heck toms last page title is this:"Can The World’s Best Bundle Save Radeon HD 7990?"ROFL...That pretty much sums up what they found...AMD sucks currently when FCAT is thrown in the picture.

But even leaving that out they put 5 gamers in a pepsi/coke style blind play test. ALL 5 CHOSE NV 690 gtx as the better card. They even note both Titan and 690GTX gave a better gaming experience.

It's funny you didn't mention what tom's found with noise:"It’s only unfortunate that power-related vibrations generate more volume than the coolers themselves."hmmm....I guess you guys will keep claiming something about fcat problems until AMD solves their issues just as I've said before. This site is really losing credibility.http://www.tomshardware.com/reviews/radeon-hd-7990...

http://www.pcper.com/reviews/Graphics-Cards/AMD-Ra..."Perhaps they are using multiple displays for Eyefinity/Surround setups - in that case, the HD 7990 has different but equally traumatic problems. In our testing, nearly every other frame generated by all of our games tested are dropped and never shown to the gamer, resulting in frame rates at about half of what they should be and half of what is being reported by some other testing methods. That's just not acceptable. We are working on another story that directly compares the issues of Eyefinity and Surround that we hope to have up by next week along with some videos to demonstrate those complicated issues. "

Other people draw the exact OPPOSITE conclusions from this site's conclusions...LOL. “traumatic problems” in multi-monitor setups is a pretty harsh thing to say correct?

But then you come up with this zinger:"As we’ve seen in the past AMD does a bit better than NVIDIA at multi-monitor resolutions, so while the 7990 trails the GTX 690 at 2560, it immediately jumps ahead at 5760."From your shogun page...How much does AMD pay you guys to say complete opposites of other review sites using FCAT results? Are they completely funding your site at this point or what?

"It’s not a problem at this moment, but 2GB at multi-monitor resolutions in particular is going to be a wall very soon, and 2560 may not be too far behind. 2GB per GPU was reasonable in 2012, but now it’s a year later and things change. So for as little as we can predict something to be future-proof, AMD certainly seems to have an edge."Yeah, get back to me when you're not making up stuff that isn't happening. As toms 5 gamers showed, NV was better all around and all 5 chose NV without knowing which was which. That kind of data matched their FCAT results exactly, even with the beta2 latest driver and the Prototype driver that won't be out until who knows when. After Q2 isn't specific...that could mean 2014. While the prototype driver helped at toms they still had issues and the gamers still chose NV even after testing again with prototype.

“But when we combine the quantitative data enabled by video capture-based performance analysis and the subjective judgments of a panel of gaming enthusiasts who simply want to play their favorite titles on the best hardware possible, Nvidia’s thousand-dollar GeForce GTX 690 outshines the similarly-priced Radeon HD 7990. Our early look at AMD’s prototype driver suggests that more evenly pacing the rate at which frames are shown on-screen helps minimize frame time variance, which our gamers definitely noticed. But that release isn’t expected for months—the second half of 2013 is as specific as AMD gets.”

Also, you tested all the way to 5760...Memory isn't a problem and won't be for a long time (don’t forget the titan has 6GB!). They don't program games for cards that barely exist. I'm guessing this is a limited run just like asus' card only had 1000, unlike NV's first titan run which was 100,000 and is sold out still today after more runs...LOL.

Without the games as incentive toms gives this on the conclusion page:“And so we’re faced with a card that represents a huge improvement over its predecessor, but still comes up shy of its competition, and is priced like an equal.”

The games get old or I already have them. But I have to live with the card itself (especially at these prices) for probably 4-5 years or maybe more.

“For buyers that have faith in multi-GPU scaling and AMD’s ability to deliver timely profile updates the 7990 can and will handily surpass Titan by about 20%”

Umm…Have you read Hardocp’s driver review of AMD’s situation for the last year? They were 6 months late on some game optimizations and it took them a year to get drivers even near right and Enduro still sucks according to notebookcheck’s 7970 rehash review.http://www.hardocp.com/article/2013/03/04/2012_amd...They paint a pretty POOR driver picture for a year for AMD. While you’re there read their review of the 7990 which also points to multimonitor problems:“We have sent our experiences to AMD, and hopefully there will be a fix in the future and then we can bring you TressFX performance under Eyefinity and CrossFire.”

LOL. But you think it’s all good with multi-monitor’s and think the memory future proofs it eh ryan? Everyone else thinks it sucks and has issues. Comically they found a slide showing AMD claiming to be able to do 3840x2160 in tombraider. They couldn’t get it to run there at all:“AMD is claiming playable performance in Tomb Raider with TressFX enabled at a resolution of 3840x2160. We wanted to test this ourselves, and found where Tomb Raider stores its graphics settings in the registry. We attempted to force 3840x2160, unfortunately the game would not start at this resolution.” Followed by this little gem, “Therefore, we find it highly unlikely that AMD's claim is valid.” Well ok then. They made the same claim for crisis 3…Which again Hardocp attempted to prove (right or wrong):“Above is our run-through at "max settings" at 3840x2160. You can clearly see that performance is very poor on the AMD Radeon HD 7990. The minimum framerate is 10 FPS, and the average is 19.4 FPS, well under 30 FPS. This level of performance is not playable in Crysis 3.”…Well ok then…Another lie shot down eh? “This claim is clearly invalid.”Yeah, we hear you loud and clear. Two AMD claims, two AMD lies. It didn’t even work with 1.3mil pixels less res of 5760x1200 for them. They got below 30fps.Farcry note: “GeForce GTX 680 SLI has the lowest framerates, but the smoothest overall experience thanks to SLI's non-stutter gameplay compared to CrossFire in this particular title.”Yeah, that’s kind of what tomshardware and their 5 game players said. No stutter=BETTER gameplay.

And when they found your memory claim kicking in:“Hitman is sensitive to VRAM capacity. In this case, the AMD Radeon HD 7990 and Radeon HD 7970 GHz Edition CrossFire have the advantage thanks to the larger 3GB of VRAM per GPU. GeForce GTX 680 SLI only has 2GB per GPU.”“The drops in performance make gameplay not possible because it hitches and lags behind as you are playing.”So when your situation actually happens, it isn’t playable already anyway…LOL Not the minimums on all cards were under 3fps…LOL. That’s not a type man, it’s they all scored 1, 2 & 3 fps…ROFL. But you keep trying to help AMD any way you can ryan…They need it…LOL.Their conclusion page:“Hopefully after reading this evaluation you've come to the same question we have, "Where's the missing performance?"….So the card sucks then there too? They even manually turned up powertune 20% and got the same results. And again another site saying it: “Quite simply, AMD CrossFire is the stutterer in the room.” Yeah we know the 5 gamers said the same at toms. His 680 GTX experience however is described as this on the same page:“I was in awe. It felt smooth, really smooth, it felt like it was running at a faster framerate than it really was.”…Yeah kind of why the 5 gamers at toms picked it too. He calls the 7990 a “BAD VALUE”.

Again, 80 pages of complaints at notebookcheck’s forums don’t lie either. People need to take all the AMD driver complaints into major consideration. Who here thinks AMD’s drivers are great and on time? We’ll be waiting months for them to fix a problem they’ve had for a year+ and enduro has had issues for as long also (notebookcheck’s first review was awful and the second fixed some but not everything, they still say it has a ways to go compared to NV). Just google 7970m & notebookcheck you’ll get there people. It’s laughable hardocp crashed trying to prove AMD’s driver claims.

PCPER’s review conclusion page says the same about drivers:“With its performance completely dependent on CrossFire technology, the HD 7990 as a $1000 graphics card has a very hard time justifying its price. With our early testing of the Catalyst prototype driver showing positive results though, there is yet hope for CrossFire to be fixed in this generation, at least for single monitor users! But until that driver is perfected, is bug free and is presented to buyers as a made-for-primetime solution, I just cannot recommend an investment this large on the Radeon HD 7990.”

LOL…HOPE…At least for SINGLE monitor users. Ryan Shrout says TITAN for multi-monitor and 690GTX for single monitor. It seems everyone says quite the opposite of you Ryan Smith. I could keep going but hopefully people get the point. NOBODY sees it like anandtech.

Check out Techpowerup’s review also people…Shows a TON of games these guys leave out. Skyrim, Assassins Creed 3, F1 2012, Borderlands 2, StarCraft2 Heart of the Swarm, Diablo3, COD Black ops2, and World of Warcraft (awful scores for radeons on WOW). The 690GTX basically wins everything at nearly ever res. Guess that’s why NONE of these are tested at anandtech even though they are all HUGE sellers compared to crap like Warhead, Dirt Showdown. Nobody PLAYS Warhead based on server checks, and which nobody bought in the case of showdown. Makes you wonder why these two games get tested here don’t it people? Why leave out multi-million units popular sellers like these that they leave out? It’s because you’d get a very clear picture of why NV owns 65% of the gaming market. Overall in their 20 or so games Titan was 4% faster and GTX 690 was 14% faster.The negatives they state?:• High price• Annoying coil noise• Requires CrossFire game support to reach proper performance• Many games do not scale properly in CrossFire• Very high multi-monitor and Blu-ray power consumption• Slim performance gains from overclocking• Long cardAgain with the COIL NOISE and of course they note all the games with crossfire issues in their review.:“Out of eighteen titles, five did not scale, or worse, showed negative scaling. These are not small titles, but big AAA games: Assassin's Creed 3, Batman: Arkham City, F1 2012, StarCraft II, Skyrim, and World of Warcraft. What really surprises me is that this long list is the same as the one we had with our reviews of HD 7990 "New Zealand" implementations by board partners, like the ASUS ROG ARES II and PowerColor Devil 13. So either AMD does not care or can't fix CrossFire support with these games millions of people play.”

Jeez…5 out of 18 games running like CRAP and they’re all AAA titles. Is this why they are all OUT of Anandtech’s gaming suite ryan? Again I ask, how much is AMD paying you guys or do you just really love them that much?“What is a major issue, though, is the extremely annoying coil whine the card emits as soon as it runs a 3D application.”He notes the 690 GTX and Titan have no such issues. Also notes it OVERPOWERS the fans just as Toms said. Forget to mention this did you ryan?“In order to overcome the frametime issues some of our colleagues reported, AMD is working on a new driver to improve things, and has provided us with it, but it's only for Windows 8 and sacrifices some performance for more constant frame delivery.”

So win7 users won’t even be expecting this HOPE driver then? OF course it slows things down also. I hope you’ll be benchmarking it rather than just telling us how AMD smoothed out play…But I doubt it. You’ll forget to mention what they already found…IT’S SLOWER WITH THE HOPE DRIVER. Nuff said I guess...Read other reviews people and judge Ryan Smith yourself.Reply

“For buyers that have faith in multi-GPU scaling and AMD’s ability to deliver timely profile updates the 7990 can and will handily surpass Titan by about 20%”

That doesn't sound like he'd go against it as all the others I've shown flatly did. Raise your hand if you have faith in ANY amd drivers, or them being on time. Read the stuff I linked to, every site made driver comments. Look at Ryan Shrout's comment on them ignoring millions of users and still having crap drivers. Heck he basically is recommending it for "future proof" memory crap. HOGWASH. Titan has 6GB and as hardocp showed to tap out memory you end up at 3fps or less. What good is future proof crap if you can't play when at 30fps when the future kicks in?...LOL

Also, he said FCAT article coming last week. AS I said they won't write one until AMD fixes their issue. Where is this magical article? Every other big site has dealt with FCAT but this one. Strange yes?Reply

If they won't sell price will drop soon enough, If they sell there's not reason to lower it.This is possible an attempt to get a bit more money on their quite underpriced flagship GPU. nvidia sells a smaller GPUs for a higher price, meaning that AMD is not getting all the potential they could with such a solution.However I do not know how many of these cards they can sell. AMD is famous for the no-quality of their crossfire (stuttering) and for its support (there are still many games where their crossfire do not scale at all), so spending such an amount of money for something that won't deliver a good enough experience is quite useless.It is much better a solution made up of 2 discrete cards, so you can easily get rid of them once you (soon) become disappointed with AMD crossfire support.Reply

Now we can compare which company comes aorund with the LESS BUGGY dual GPU $999 "hopefully it will show twice the performance - unfortunately it rarely does" mess of a product...

It's the perfect card for the 1%, because they don't have to worry about price, power draw, noise or pretty much everything else (they sure as hell don't soil their hands with manual labor, but have them assembled for a few grand extra).My suggestion is to make both of them into "limited editions" by replacing every plastic part possible with solid gold...Reply